Filter cap



FIG. 1 is a top perspective view of a filter cap showing our new design;

FIG. 2 is a bottom perspective view of the filter cap of FIG. 1;

FIG. 3 is a top plan view of the filter cap of FIG. 1;

FIG. 4 is a side view of the filter cap of FIG. 1 with the opposing back view being a mirror image thereof;

FIG. 5 is a left side view of the filter cap of FIG. 1, with the opposing right side view being a mirror image thereof; and,

FIG. 6 is a bottom plan view of the filter cap of FIG. 1.

The broken lines in FIGS. 1-6 of the drawings are for the purpose of illustrating portions of the filter cap, which form no part of the claimed design. 

CLAIM The ornamental design for a filter cap, as shown and described. 